I had no issues with stock sport wheels (+55mm) with 285/70R17s with a 2.5" level and 1.5" Spacers. Ran them like that for 60,000 miles, never scrubbed once. I did unbolt and remove the crash bars.
Recently I have installed 315/70R17s with the same setup, trimmed the corners off of the fender...
I suppose it has been a while since any progress was made on this, but doing some research, I noticed that the new F-150 fuel tanks have the same straps, and fuel pumps as the Rangers do. I need to measure the distance between the straps to see if they are different.